Across
- 3. small bodies of ice and dust. Have an elliptical shaped orbit. Develops a "tail" of ions and dust as it approaches the sun.
- 5. mass or rock or metal that burnt up as they enter the Earths atmosphere
- 6. distance in light travels in 1 year (6 trillion miles)
- 10. path followed by a star, planet, or satellite around a more massive body
- 12. Jupiter, Saturn, Uranus, Neptune
- 13. small celestial objects that orbit all planets except Mercury and Venus
- 15. term given to objects that move in orbits around more massive objects such as the Sun. Includes planets, moons, asteroids, comets, meteors, satellites.
Down
- 1. meteor that has survived the Earths atmosphere and impacted Earth
- 2. a period of time in which large numbers of meteors enter the atmosphere. Occur when Earth passes through debris from a comet.
- 4. Galaxy in which Earth is found
- 7. Mercury, Venus, Earth, Mars
- 8. system formed by the Sun & planets, moons & other celestial objects that orbit around it
- 9. area surrounding a planet that partially determines a planets' ability to support life. Earths atmosphere is comprised of 78% N, 21% O, carbon dioxide (CO2) and Argon (Ar).
- 11. rocky, planet-like object orbiting the sun. Most are located between Mars and Jupiter in a region called the asteroid belt.
- 14. study of celestial bodies